From 33962a4420cc908af5f64083a6bfe843dc0c7ecb Mon Sep 17 00:00:00 2001
From: Linus Heckemann <git@sphalerite.org>
Date: Thu, 4 May 2017 16:52:07 +0100
Subject: [PATCH] stdenv: fix "grep: invalid range"

---
 pkgs/build-support/setup-hooks/multiple-outputs.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pkgs/build-support/setup-hooks/multiple-outputs.sh b/pkgs/build-support/setup-hooks/multiple-outputs.sh
index eafc770a8e17..62a6491b8dc0 100644
--- a/pkgs/build-support/setup-hooks/multiple-outputs.sh
+++ b/pkgs/build-support/setup-hooks/multiple-outputs.sh
@@ -61,7 +61,7 @@ _multioutConfig() {
             local shareDocName="$(sed -n "s/^PACKAGE_TARNAME='\(.*\)'$/\1/p" < "$confScript")"
         fi
                                     # PACKAGE_TARNAME sometimes contains garbage.
-        if [ -n "$shareDocName" ] || echo "$shareDocName" | grep -q '[^a-zA-Z-_0-9]'; then
+        if [ -n "$shareDocName" ] || echo "$shareDocName" | grep -q '[^a-zA-Z0-9_-]'; then
             shareDocName="$(echo "$name" | sed 's/-[^a-zA-Z].*//')"
         fi
     fi